Products using duplicate use of these devices in some cases fire engineering construction projects. Such as Chongqing Tobacco Building is an example. Automatic tobacco smoke damper Chongqing mainly office and commercial buildings, walkways long mechanical exhaust system is set up, each floor is only a smoke partition. Smoke on each floor electric charge of the design of a normally closed damper, each of each exhaust port has designed an electric normally closed exhaust valves, exhaust fan inlet of the fire has designed a normally closed electric smoke damper. Obviously, this design features a waste of existence, but also modules, valves, construction costs of waste. Remote control plate discharges require remote control, remote manually open, DC24V open telecommunications, remote manual reset, turn signals or interlocking feedback signal, no warm feeling damper, with 6m rope. Near the control plate discharges contrast, close to manually open, DC24V electrical open, close the manual reset, turn signals or interlocking signal feedback damper installation, no warm feeling plate discharges purposes: general installed elevator, corridor, no exhaust port at the window of a room on the exhaust system, the upper surface of the stick side wall or ceiling surface. Usually in a normally closed remote control damper, open for smoke fire. Operating device installed in the vicinity of the exhaust port from the high walls around 200mm ground by rope operating device associated with the exhaust port for remote control, the length of wire rope is generally 6m. Technical parameter # operation voltage / current: DC24V / 0.5A # temperature sensor operating temperature: 70 ℃ # refractory time: 1.5h # air leakage: 290m3 / h · m2 (standard state) # when full drag coefficient: <0.4. Stainless steel damper, Rui Xincheng air conditioning (certified), Shuangyashan dampers provided by Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.